18712073 has 2 divisors, whose sum is σ = 18712074. Its totient is φ = 18712072.

The previous prime is 18712069. The next prime is 18712081. The reversal of 18712073 is 37021781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13454224 + 5257849 = 3668^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 18712073 - 2² = 18712069 is a prime.

It is not a weakly prime, because it can be changed into another prime (18712013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9356036 + 9356037.

It is an arithmetic number, because the mean of its divisors is an integer number (9356037).

Almost surely, 2^18712073 is an apocalyptic number.

It is an amenable number.

18712073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18712073 is an equidigital number, since it uses as much as digits as its factorization.

18712073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 18712073 is about 4325.7453692976. The cubic root of 18712073 is about 265.4853949310.

The spelling of 18712073 in words is "eighteen million, seven hundred twelve thousand, seventy-three".